What are some alternatives?
When comparing gReader and Google Play Music, you can also consider the following products
Inoreader - Dive into your favorite content. The content reader for power users who want to save time.
Serendipity by Spotify - Map shows when two people play same song at same time
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
PaperOak - The best free Rss reader
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.